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Thank you for your answer. RE: the wording around order creation, yes that could be more clear. My intention is that the order service simply emits an event indicating that the order was created and it would be the responsibility of the inventory microservice to consume that event and update inventory accordingly. I think my issue is a mix of 1 and 2. Stock that is physically missing is always a problem and falls clearly into case 2. But I also don't want to introduce this issue unnecessarily by allowing buyers to buy things that are known to be out of stock.

Ray Saltrelli
– Ray Saltrelli

2018-09-05 14:13:10 +00:00
Commented Sep 5, 2018 at 14:13
2

OK about the events. I agree that you want to limit scenario number 2 as much as possible, but given that you cannot avoid it completely, you have to deal with it. I could think of ways to minimise the "race condition" (which as another answer points out it's not a real race condition, as business processes don't really work at the seconds level), but I would need to know more about the implementation, sorry.

Francesc Castells
– Francesc Castells

2018-09-05 14:39:40 +00:00
Commented Sep 5, 2018 at 14:39

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